SamuelP

2001 camaro z/28 134k

Car will not start. Car turns over and will fire with starting fluid .
I heard no turning on of the fuel pump so I replaced it and the fuel filter.
Unfortunately the car will not start. I have 0 pressure on the fuel rail.

The pump turns on and works as far as I no. It returns gas and pumps it out. I took off the hoses to confirm this.

I am beside myself and stumped. A guy at a parts store said it could be the fuel pressure damper on top of the intake.

Anyone have any advice for me?

jdoyle

iTrader: (27)

have you checked your fuses and relays?

my IGN relay went bad and the car would crank and crank but not start nor run.

you can swap the IGN relay with one of the fan relays.

you've also confirmed that your battery and starter and such is good, right?

has this car been sitting for a long time?

SamuelP

i have gas pumping to fuel rail. When I check pressure it goes to 3. Car starter is good. I also did the under hood relay switching around and it did not work.

I'm at a loss here as to my next step. If I have fuel coming from pump, that's good but I'm not sure if it's the correct pressure coming from pump. Then I think is the Fuel injection Pressure damper restricting the flow of gas to the rails?

jdoyle

iTrader: (27)

what does the bolded and underlined sentence mean? 3psi?

are all your grounds good?

https://www.mediafire.com/?40mfgeoe4ctti
the link above will is for some factory service manauls. they dont have one for an 01 but they have one for a 2000. i imagine they arent too different from each other.

what fuel pump did you put in the car?

ive attached an excerpt from the factory service manual on fuel troubleshooting. looks like the fuel pressure you should be looking for is 55-60PSI IF you are using a stock fuel pump.

that should be a good start

SamuelP

Hey thanks for the manuals.

Pump runs. Gas flows to rails. Gas also returns to tank. No pressure at the rails.

This was a no start, upon I replaced fuel pump and fuel filter.

I am beside myself. No codes are reported. Best I figure the fuel injection pressure damper is not operating and stopping the flow of fuel into the rail.

But I read that nobody else has had this issue.

SamuelP

Oh and the 3 is the fuel pressure taken at the fuel rail.

jdoyle

iTrader: (27)

are all your grounds good?

what fuel pump did you put in the car?

SamuelP

I bought fuel pump from advanced auto parts carquest brand pump. What grounds should I check?

jdoyle

iTrader: (27)

all of them but specifically the ground on the back of the cylinder head. i think one of the grounds on the back of the cylinder heads grounds the injectors.

how did the install of the pump go? any missing or excess parts?

UNDER_PRESSURE

iTrader: (2)

If you mean 3 psi that's your problem. Factory psi is in the 60psi range. Remove the fuel pump and make sure the fuel line going from the pump to the lid is not leaking or lose.

joecar

Your fuel pressure regulator is at the fuel rail...?

Does your FPR have a reference hose going to the intake manifold...?

Remove the reference hose from the FPR, and check to see if the inside of the hose is wet with gasoline.

With the reference hose removed, does gasoline leak out of the FPR when the fuel pump runs...?

Either way, sounds like your FPR has failed.

jdoyle

iTrader: (27)

the stock location for the FPR is in the tank.

joecar

He said gas returns to tank, so he may not have the stock fuel system.


Either way, if gas is returning to tank, then the FPR is broken (allows fuel to dump to tank).

SamuelP

So gas on a 2001 z/28 is not designed to have gas return to tank?

jdoyle

iTrader: (27)

that is not what the attachment is saying.

but i think it depends on how the gas is getting back to the tank. look at step 4 and 5 of the attachment in post 4. i think what we are getting at here is if the gas return to the tank via the return line, all is well. if gas returns to the tank from the feed line, then you have a problem. if the gas returns to the tank from the feed line, thats a faulty FPR right?

joecar

1998-2002 F-car fuel system has a non-referenced (BARO referenced) FPR in the tank, it is fed from the Tee'd off line just past the fuel filter (you can see the line goes to the tank, it feeds the FPR), and the FPR regulates pressure by dumping fuel back into the tank.

1999-20xx Truck fuel system has a manifold-referenced (MAP referenced) FPR at the fuel rail, the manifold reference sets the pressure that the FPR regulates to, the FPR dumps fuel into the return line which goes back to the tank.

In each of the above systems, if the FPR has failed (broken internal spring), it will dump fuel back into the tank, and the regulated pressure will be low.

joecar

Fuel will not return thru the feed line because the pump is pushing it thru the feed line...

in normal operation, the FPR is continually bleeding off small amounts of fuel back to the tank, this is how it regulates rail pressure;

if the FPR's spring is weak/broken, a large amount of fuel pushes past the spring-loaded valve (and returns to tank), this will prevent pressure from being regulated, you will see low/zero pressure at the rail.

SamuelP

So on my 01 z/28 gas is not suppose to return to tank?

joecar

Not from the fuel rail.

SamuelP

It was a defective fuel pump. Lame.